摘要： 下列有机物的一氯代物的同分异构体数目相等的是----------------( ) ① CH2-CH3 ② CH3 ③ CH3 CH3 ④ -CH3 CH2＝C-CH-CH-CH3 CH3-CH-CH-CH-CH3 CH3 CH3 CH3 CH3 CH2-CH3 A. ① ② B . ② ③ C . ③ ④ D . ① ④

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